Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd78cdc40366e15c…

MALICIOUS

PDF

41.9 KB Created: 2020-10-05 23:19:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-19
MD5: 60878b55417b621d494a22673f97ad81 SHA-1: ac09c167906a167e929037c5c8b5ed9f499b2094 SHA-256: cd78cdc40366e15ca6326022f8f39399425221aa94b5299ac32d15a0088e3dd7
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/strik?keyword=phase+space+trajectory+pdf In PDF document text
    • https://site-1036832.mozfiles.com/files/1036832/44177214320.pdfIn PDF document text
    • https://site-1039217.mozfiles.com/files/1039217/68646102910.pdfIn PDF document text
    • http://musefiva.performcenterstage.com/uploads/1/3/1/4/131438013/6bea78b6d3.pdfIn PDF document text
    • http://pudadejab.yorkrepublicanwomen.org/uploads/1/3/1/8/131857152/lewomusuv_wilavadejidazek.pdfIn PDF document text
    • http://files.kelseapiquette.com/uploads/1/3/2/6/132682134/6938180.pdfIn PDF document text
    • https://site-1036819.mozfiles.com/files/1036819/xajimutapiluwalen.pdfIn PDF document text
    • https://site-1036911.mozfiles.com/files/1036911/sazarulerulekekeviseguji.pdfIn PDF document text
    • https://site-1041926.mozfiles.com/files/1041926/xubeniximakevisudogibu.pdfIn PDF document text
    • https://site-1039162.mozfiles.com/files/1039162/38090429715.pdfIn PDF document text
    • https://site-1036894.mozfiles.com/files/1036894/majenemedemefajeno.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8511/4781/files/vogeturafemudineluzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8837/4680/files/87873032011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0670/0963/files/lozerezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/1703/8747/files/compare_and_contrast_the_inca_and_aztec_empires_in_terms_of_political_administration.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6635 5392 bytes
SHA-256: 4b2e07cd4fab9d1ad61c6fe803b564e05f3bcf742796b89cbada5850d9bf85e6
font_01_sfnt_off00007892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7892 10176 bytes
SHA-256: b5e8797c7e4dd09c57dc4761220df33bb1664a3a68266d4c591b706b338b402e

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